US Trademark Office Search by Class: A Comprehensive Guide
When it comes to protecting your brand identity, conducting a thorough US trademark office search by class is an essential step in the trademark registration process. In this article, we'll delve into the world of trademark classification and explore how to navigate the USPTO's database to ensure your trademark is unique and available for registration.
Understanding Trademark Classes

Trademark classes are a way to organize goods and services used in applications, making it easier to assess fees, search the database, and determine conflicts with existing trademarks. The USPTO uses the Nice Classification system, which consists of 45 classes and 1,123 subclasses. Each class represents a broad category of goods or services, and international agreement determines the classification.
- Class 1: Chemicals used in industry, science, and photography
- Class 2: Paints, varnishes, lacquers, and related products
- Class 3: Bleaching preparations and other substances for laundry use
- Class 4: Industrial oils and greases
- Class 5: Pharmaceutical, veterinary, and sanitary preparations
- Class 6: Common metals and their alloys
- Class 7: Machinery and tools
- Class 8: Hand tools and implements
- Class 9: Electrical and scientific apparatus
- Class 10: Fireworks and fire safety equipment
- Class 11: Apparatus for lighting, heating, and cooking
- Class 12: Vehicles
- Class 13: Firearms and ammunition
- Class 14: Precious metals, precious stones, jewelry, and cutlery
- Class 15: Musical instruments
- Class 16: Paper and cardboard products
- Class 17: Rubber, leather, and imitations of leather
- Class 18: Leather and imitations of leather
- Class 19: Building materials
- Class 20: Furniture
- Class 21: Household and kitchen utensils
- Class 22: Ropes, string, and cordage
- Class 23: Yarns and threads
- Class 24: Textiles
- Class 25: Clothing
- Class 26: Lace and embroidery
- Class 27: Carpets and rugs
- Class 28: Games
- Class 29: Meat and processed foods
- Class 30: Coffee and tea
- Class 31: Agricultural products
- Class 32: Beers
- Class 33: Wines and spirits
- Class 34: Tobacco products
- Class 35: Advertising, marketing, and business services
- Class 36: Insurance and financial services
- Class 37: Construction and building services
- Class 38: Telecommunications services
- Class 39: Transportation and shipping services
- Class 40: Computer and software services
- Class 41: Education and training services
- Class 42: Scientific and technical services
- Class 43: Hotel and restaurant services
- Class 44: Medical, dental, and veterinary services
- Class 45: Personal and social services